Doctor's Note

This is the sixth video in a nine-part series on vitamin D. Be sure to check out yesterday’s video: Vitamin D Supplements May Be Necessary.

For more context, check out my associated blog posts: Vitamin D: Shedding Some Light on the New RecommendationsEating To Extend Our Lifespan; and Vitamin D from Mushrooms, Sun, or Supplements?.

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  • Michael Greger M.D.

    Please feel free to post any ask-the-doctor type questions here in the comments section and I’d be happy to try to answer them. This is the sixth video in a nine day series on vitamin D. Be sure to check out yesterday’s video-of-the-day Vitamin D supplements may be necessary.

    • elsie blanche

      Dr. Greger, have you considered the possibility that humans should only be taking in vitamin D from the interaction of the sunshine on our skin, that all forms of vitamin D that we pass through our mouth (both supplements and food sources) somehow might be disrupting some sort of internal homeostasis as far as vitamin D receptors, hormones, autoimmune regulation. Something seems amiss to me, the popping of pills and food and expecting the same exact reactions internally as that of the relationship of the sun’s rays and our skin. Are humans possibly playing god by popping pills? And is there a limitation and or consequence to this that might possibly be unknown to us?

  • Michael Greger M.D.

    For some context, please check out my associated blog post Vitamin D: Shedding Some Light on the New Recommendations!

  • Amanda

    I had 18.9 ng /ml (30.0-100.0 ng/mL)
    So I used liquid vitamin D (vitamin D-cure) , 12 drops a day. And my levels were last time around 32

  • Amanda

    I have a question: what can be done for females to lower androgen hormones (androstenedione) ? I dont eat much fat, basically eat like you say in all the videos, been vegan (sometimes eat eggs from my chickens) for 10 years. I’ve been tested for PCOS and don’t have that. Im 26 now. are there any supplements that might help lower androgens in females?

  • claude

    When you consume a vitamin D supplement of 5,000 IU, why does the vitamin D in your organism decreases.

  • claude

    What I mean is that I have been consuming the vitamin D 5,000 IU
    supplement, and instead of increasing, the vitamin D in my organism has been
    decreasing. For instance I had 26 ng/ml, and after consuming the supplement it
    went to 52 ng/ml (it increased), so I continued taking the supplement, but then
    it lower to 35 ng/ml. So i was wondering, why did this happen.

  • Oksana555

    Hello Dr. Greger, I was wondering if vitamin K2 MK-7 needs to be taken along with vitamin D3? D3 transports calcium to blood; while MK-7 takes it from blood and accompanies Ca2++ to our bones. Thank you in advance.